Here’s an exhibit where watching is at least half the fun. You can create any number of gravity-defying illusions that will amaze you and your friends: Levitate, fly, swim though the air, grow limbs (and dissolve them), crawl straight up the wall like a lizard—the sky’s the limit.
With the rope hanging down, the left and right sides of the board appear identical. Lifting the rope shows the dramatic difference that your eyes missed—and continue to miss, as soon as you let the rope fall again.
Hundreds of black rings travel randomly left and right along more than fifty horizontal strings. Closer examination reveals that the strings are driven at each end by small motors and that the rings that seem to pass through each other are actually bouncing against one another.